CN109459686A - A kind of large-current electromagnetic relay electrical endurance test device - Google Patents
A kind of large-current electromagnetic relay electrical endurance test device Download PDFInfo
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- CN109459686A CN109459686A CN201811170996.5A CN201811170996A CN109459686A CN 109459686 A CN109459686 A CN 109459686A CN 201811170996 A CN201811170996 A CN 201811170996A CN 109459686 A CN109459686 A CN 109459686A
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- relay
- intermediate relay
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/327—Testing of circuit interrupters, switches or circuit-breakers
- G01R31/3277—Testing of circuit interrupters, switches or circuit-breakers of low voltage devices, e.g. domestic or industrial devices, such as motor protections, relays, rotation switches
- G01R31/3278—Testing of circuit interrupters, switches or circuit-breakers of low voltage devices, e.g. domestic or industrial devices, such as motor protections, relays, rotation switches of relays, solenoids or reed switches
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Relay Circuits (AREA)
- Testing Electric Properties And Detecting Electric Faults (AREA)
Abstract
The invention belongs to electromagnetic relays and contactor equivalent life testing field, more particularly to a kind of large-current electromagnetic relay electrical endurance test device, it is characterized by comprising main loop modules, main control loop module, sub-control return circuit module, first monitoring device, second monitoring device, program board, main loop module is by high-power DC power supply, resistance R, tested relay J0 contact terminal, protective relay J4 contact terminal is composed in series, main control loop module is by main control D.C. regulated power supply, intermediate relay J1 contact terminal, intermediate relay J2 contact terminal, tested relay J0 coil terminals are composed in series, sub-control return circuit module is by sub-control D.C. regulated power supply, intermediate relay J3 contact terminal, protective relay J4 coil terminals are composed in series, the second monitoring is provided in main loop module Device is provided with the first monitoring device in main control loop module.Device dual fail-safe control loop provided by the invention can survey high current, is simple for structure, practical.
Description
Technical field
The invention belongs to electromagnetic relays and contactor equivalent life testing field, and in particular to a kind of high current electromagnetism relay
Device electrical endurance test device is suitable for the fields such as new energy, electric power.
Background technique
Relay is a kind of electric control device, when input quantity changes, output quantity by occur great-jump-forward change from
Movement controller part.The electrical endurance of relay refers to the number that can be acted after relay contact bringing onto load.Because contact opens and closes
When, electric arc can be generated, with increasing for opening/closing frequency, electric arc also deepens the influence that contact generates therewith, and most commonly seen is
Relay adhesion.It can be seen that carrying out electrical endurance test to relay, and then select the important of suitable reliable relay
Property.
Such as CN201711133937.6, a kind of relay life detection device, including controller unit, L on-off are counted
Unit, relay drive unit etc. can carry out counting to get on-off respectively to the on-off number of multiple relay switches simultaneously
Count value, and according to on-off count value come judge relay and its switch whether fail；It is arranged using outside controller unit
The mode that multiple counters respectively count the on-off number of relay switch, while detecting the relay of relay life
The limitation of the uncontrolled device unit internal counter quantity of number of switches.
CN201320694312.8, a kind of electromagnetic relay life detecting device include relay to be checked, this it is to be checked after
Electric appliance includes relay coil to be checked and relay contact to be checked, further include have ac-dc switching power, photoelectrical coupler,
PLC controller, the second relay for being closed fault detection, the third relay for disconnecting fault detection, first count
Device, the second counter and third counter, the cathode output end and cathode output end of the DC conversion power pass through photoelectricity
Coupler is connected on the voltage detecting com port of PLC controller；The execution output com port of the PLC controller includes three
It is a, and this three execution output com ports respectively with relay coil to be checked, the second relay coil and third relay coil phase
On the cathode output end for connecting and being linked into DC conversion power.
Currently, common electric relay detection device is expensive on the market, structure is complicated (passing through PLC controller) and nothing
It is inflexible not flexible that method detects high current, detection mode；Also it or by multichannel independent wiring tests, complex circuit.
Summary of the invention
In order to solve the above technical problem, the present invention provides a kind of dual fail-safe control loops, the electromagnetism relay of survey high current
Device electrical endurance test device.
The technical solution of the present invention is as follows:
A kind of large-current electromagnetic relay electrical endurance test device, including main loop module, main control loop module, pair
Control loop module, the first monitoring device, the second monitoring device, program board, main loop module is by high-power DC power supply, resistance
R, tested relay J0 contact terminal, protective relay J4 contact terminal are composed in series, and main control loop module is straight by main control
Flow regulated power supply, intermediate relay J1 contact terminal, intermediate relay J2 contact terminal, the series connection of tested relay J0 coil terminals
Composition, sub-control return circuit module is by sub-control D.C. regulated power supply, intermediate relay J3 contact terminal, protective relay J4 coil
Terminal series-shunt forms, and is provided with the second monitoring device in main loop module, and the first monitoring dress is provided in main control loop module
It sets.
Further, program board includes digital block module and simulation region module；Simulation region module is controlled respectively by PWM mode
Intermediate relay J1 processed, intermediate relay J2, intermediate relay J3 coil terminals voltage；Digital block module can monitor respectively
The voltage of intermediate relay J1 coil terminals, the voltage of intermediate relay J2 coil terminals, intermediate relay J3 coil terminals
Voltage, the voltage of the first monitoring device, the second monitoring device voltage.
Further, intermediate relay J1, intermediate relay J2, intermediate relay J3 coil terminals voltage both ends are in parallel
0.1uF capacitor.
Further, the first monitoring device is Hall current sensor H1, and the second monitoring device is Hall current sensor
H2。
Further, Hall current sensor H1+end and the first regulated power supply of the end GND Jie on, Hall current sensing
The end the M series resistance R1 of device H1 connects at the end GND of Hall current sensor H1, Hall current sensor H2+end and GND termination
On the second regulated power supply, the end the M series resistance R2 of Hall current sensor H2 is connect at the end GND of Hall current sensor H2.
Further, using following steps: A) first by program board with by the way of PWM to intermediate relay J1, centre
Relay J2, intermediate relay J3 coil terminals power on, intermediate relay J1, intermediate relay J2, intermediate relay J3 contact
Terminal conducting, and then protective relay J4, tested relay J0 coil terminals voltage generate therewith, protective relay J4, tested
The conducting of relay J0 contact terminal, main loop module are powered；
B) program board reads Hall current sensor H1 and Hall current sensor H2 output end voltage, calculates major loop mould
The current value of block and main control loop module, judges whether tested relay J0 and intermediate relay J1 fail indirectly, major loop
Module and main control loop module have electric current, then continue step C), otherwise directly carry out step E)；
C) intermediate relay J2, intermediate relay J3 coil terminals is kept to power on, the power-off of intermediate relay J1 coil terminals,
Intermediate relay J1 contact terminal will be switched off, the power-off of main control loop module, and then tested relay J0 coil terminals power off, main
Return circuit module power-off；
D) program board reads Hall current sensor H1, Hall current sensor H2 output end voltage, calculates major loop mould
The current value of block and main control loop module, judges whether tested relay J0 and intermediate relay J1 fail indirectly, major loop
Module and the equal no current of main control loop module, then continue back at step A) next round circulation is opened, and record one cycle time
Otherwise number directly carries out step E)；
E) intermediate relay J1, intermediate relay J2, intermediate relay J3 coil terminals power off simultaneously；Main control loop mould
Block power-off, tested relay J0 coil terminals power-off, main loop module cutting；And/or sub-control return circuit module power-off, protection after
Electric appliance J4 coil terminals power off therewith, main loop module cutting.
F tested relay J0 and intermediate relay J1 disabled status) are detected；Intermediate relay J1 failure, tested relay
J0 does not fail, then replaces intermediate relay J1；Or tested relay J0 fails, then termination test, records on-off number,
And it is sent on computer.
Beneficial effects of the present invention:
1. the circuitry cuts of whole device are divided into main control loop and sub-control circuit to complete, double insurance, greatly
It ensure that the safety of the present apparatus.
2. can be judged by the signal that Hall current sensor exports whether the failure of tested relay, both facilitated
Again efficiently.
3. the service life that the present invention can test large-current electromagnetic relay.
Attached drawing effect
Fig. 1 is the structural diagram of the present invention；
Fig. 2 is electronic schematic diagram of the present invention；
Fig. 3 is flow diagram of the present invention.
Specific embodiment
In conjunction with attached drawing 1-3, the present invention is illustrated:
As shown in Figs. 1-2, electrical principle of the present invention is illustrated:
1) main loop module
Main loop module is touched by high-power DC power supply, resistance R, tested relay J0 contact terminal, protective relay J4
Joint terminal composition.Resistance R, tested relay J0 contact terminal and protective relay J4 contact terminal are connected on main loop module
In circuit, constant current is provided by high-power DC power supply, size of current is the specified breaking current of tested relay J0.
2) main control loop module
Main control loop module is by main control D.C. regulated power supply, intermediate relay J1 contact terminal, intermediate relay J2
Contact terminal, tested relay J0 coil terminals composition.Intermediate relay J1 contact terminal, intermediate relay J2 contact terminal and
Tested relay J0 coil terminals are connected in the circuit of main control loop module, are provided by main control D.C. regulated power supply constant
Voltage, voltage swing are tested relay J0 coil rating voltage.
3) sub-control return circuit module
Sub-control return circuit module is by sub-control D.C. regulated power supply, intermediate relay J3 contact terminal, protective relay J4
Coil terminals composition.Intermediate relay J3 contact terminal and protective relay J4 coil terminals are connected on sub-control return circuit module
In circuit, constant voltage is provided by sub-control D.C. regulated power supply, voltage swing is protective relay J4 coil rating voltage.
4) monitoring device
Monitoring device is divided into two parts, is made of two Hall current sensors H1, H2, two D.C. regulated power supplies (
One regulated power supply, the second regulated power supply), two resistance R1, R2 are constituted.Wherein, the first monitoring device monitors main control loop
Electric current, specially the "+" end of Hall current sensor H1 and " GND " are terminated on the first regulated power supply, and voltage swing is Hall
The nominal supply voltages of current sensor H1；The end " M " series resistance R1 (10k Ω) of Hall current sensor H1 connects at it
The end " GND ".Second monitoring device monitors the electric current of main loop module, and the "+" end of Hall current sensor H2 and " GND " are terminated at
On second regulated power supply, voltage swing is the nominal supply voltages of Hall current sensor H2；" M " of Hall current sensor H2
End series resistance R2 (10k Ω) connects at it " GND " and holds.
5) program board
Program board is by C language write-in program and stores.The plate face of program board has digital block module and simulation region module, simulation
Area's module separates the coil terminals voltage of three controls of output channel PWM mode intermediate relay J1, J2, J3, and then controls
The on-off of main control loop blocks current, in addition in intermediate relay J1, J2, J3 coil terminals voltage both ends 0.1 μ F of parallel connection
Capacitor is used to filter；Digital block module sets 5 digital input channels, monitors the coil-end of intermediate relay J1, J2, J3 respectively
Sub- voltage is the output voltage of U1, U2, U3 and Hall current sensor H1, H2 respectively.Program board connects external computer
USB, external computer can provide 5V voltage both for program board, can also be by series display device read test device at work
State.
Process of the present invention is illustrated in conjunction with Fig. 3:
A) intermediate relay J1, J2, J3 coil terminals are powered on by way of PWM program board first, are kept for 5 seconds,
In normal situation, intermediate relay J1, J2, J3 contact terminal will be connected, and then protective relay J4, tested relay J0
Coil terminals voltage will generate therewith, last protective relay J4, the conducting of tested relay J0 contact terminal, and main loop module is logical
Electricity；
B Hall current sensor H1 and Hall current sensor H2 output end voltage) are read by program board, calculating is led back
The current value of road module and main control loop module, to indirectly judge whether tested relay J0 and intermediate relay J1 lose
Effect, according to judgement as a result, continuing step C if main loop module and main control loop module have electric current), otherwise directly
Carry out step E)；
C) intermediate relay J2, J3 coil terminals is kept to power on, the power-off of intermediate relay J1 coil terminals, holding 5 seconds, just
In the case where often, intermediate relay J1 contact terminal be will be switched off, and cause main control loop module to power off, and then tested relay J0
Coil terminals also power off, main loop module power-off；
D Hall current sensor H1, H2 output end voltage) are read by program board, calculate main loop module and main control
The current value of return circuit module is tied to indirectly judge whether tested relay J0 and intermediate relay J1 fail according to judgement
Fruit, if main loop module and the equal no current of main control loop module, continue back at step A) next round circulation is opened, and remember
One cycle number is recorded, step E is otherwise directly carried out)；
E) intermediate relay J1, intermediate relay J2, intermediate relay J3 coil terminals power off simultaneously；Intermediate relay J1
There is no when adhesion, intermediate relay J1 contact terminal disconnects therewith, and main control loop module then powers off for contact terminal；If
Intermediate relay J1 contact terminal sticks together and causes intermediate relay J1 contact terminal that can not disconnect, due to intermediate relay
The power-off of J2 coil terminals, intermediate relay J2 contact terminal disconnect therewith, ensure that the normal power down of main control loop module；It is main
The power-off of control loop module, then tested relay J0 coil terminals power-off；
Similarly, tested relay J0 contact terminal is there is no when adhesion, tested relay J0 contact terminal disconnects therewith,
Main loop module then powers off；If tested relay J0 contact terminal stick together and cause tested relay J0 contact terminal without
Method disconnects, and since coil terminals power off, intermediate relay J3 contact terminal disconnects intermediate relay J3 therewith, and then sub-control is returned
Road module also disconnects, and the coil of protective relay J4 powers off therewith, and protective relay J4 contact terminal is caused to disconnect, final to guarantee
The normal cutoff of main loop module.
F tested relay J0 and intermediate relay J1 disabled status) are detected.If intermediate relay J1 fail, it is tested after
Electric appliance J0 does not fail, then replaces intermediate relay J1, continue back at step A), next round circulation is opened, and record and follow
Ring number；If tested relay J0 fails, termination test, on-off number is recorded, and be sent to the serial of computer end
On display.
For those skilled in the art, it is possible to understand that without departing from the principles and spirit of the present invention may be used
To carry out a variety of change, modification, replacement and modification to these embodiments.
Claims (6)
1. a kind of large-current electromagnetic relay electrical endurance test device, it is characterised in that: returned including main loop module, main control
Road module, sub-control return circuit module, the first monitoring device, the second monitoring device, program board, main loop module is by high power DC
Power supply, resistance R, tested relay J0 contact terminal, protective relay J4 contact terminal are composed in series, main control loop module by
Main control D.C. regulated power supply, intermediate relay J1 contact terminal, intermediate relay J2 contact terminal, tested relay J0 coil
Terminal series-shunt composition, sub-control return circuit module is by sub-control D.C. regulated power supply, intermediate relay J3 contact terminal, protection relay
Device J4 coil terminals are composed in series, and the second monitoring device is provided in main loop module, and is provided in main control loop module
One monitoring device.
2. a kind of large-current electromagnetic relay electrical endurance test device according to claim 1, it is characterised in that: program
Plate includes digital block module and simulation region module；Simulation region module by PWM mode control respectively intermediate relay J1, it is intermediate after
The voltage of electric appliance J2, intermediate relay J3 coil terminals；Digital block module can monitor intermediate relay J1 coil terminals respectively
Voltage, the voltage of intermediate relay J2 coil terminals, the voltage of intermediate relay J3 coil terminals, the first monitoring device electricity
The voltage of pressure, the second monitoring device.
3. a kind of large-current electromagnetic relay electrical endurance test device according to claim 1, it is characterised in that: intermediate
Relay J1, intermediate relay J2, intermediate relay J3 coil terminals voltage both ends parallel connection 0.1uF capacitor.
4. a kind of large-current electromagnetic relay electrical endurance test device according to claim 1, it is characterised in that: first
Monitoring device is Hall current sensor H1, and the second monitoring device is Hall current sensor H2.
5. a kind of large-current electromagnetic relay electrical endurance test device according to claim 4, it is characterised in that: Hall
Current sensor H1+hold on the first regulated power supply of the end GND Jie, the end the M series resistance R1 of Hall current sensor H1 connects
At the end GND of Hall current sensor H1, Hall current sensor H2+end and the second regulated power supply of the end GND Jie on, Hall
The end the M series resistance R2 of current sensor H2 connects at the end GND of Hall current sensor H2.
6. a kind of large-current electromagnetic relay electrical endurance test device according to claim 2, it is characterised in that: use
Following steps:
A) to intermediate relay J1, intermediate relay J2, intermediate relay J3 coil-end first in such a way that program board is with PWM
Son powers on, intermediate relay J1, intermediate relay J2, intermediate relay J3 contact terminal conducting, and then protective relay J4, by
It surveys relay J0 coil terminals voltage to generate therewith, protective relay J4, the conducting of tested relay J0 contact terminal, major loop mould
Block is powered；
B) program board reads Hall current sensor H1 and Hall current sensor H2 output end voltage, calculate main loop module and
The current value of main control loop module, judges whether tested relay J0 and intermediate relay J1 fail indirectly, main loop module
Have electric current with main control loop module, then continue step C), otherwise directly carry out step E)；
C) intermediate relay J2, intermediate relay J3 coil terminals is kept to power on, the power-off of intermediate relay J1 coil terminals is intermediate
Relay J1 contact terminal will be switched off, the power-off of main control loop module, and then tested relay J0 coil terminals power off, major loop
Module power-off；
D) program board read Hall current sensor H1, Hall current sensor H2 output end voltage, calculate main loop module and
The current value of main control loop module, judges whether tested relay J0 and intermediate relay J1 fail indirectly, main loop module
With the equal no current of main control loop module, then step A is continued back at) next round circulation is opened, and one cycle number is recorded, it is no
Then directly carry out step E)；
E) intermediate relay J1, intermediate relay J2, intermediate relay J3 coil terminals power off simultaneously；Main control loop module is disconnected
Electricity, tested relay J0 coil terminals power-off, main loop module cutting；And/or the power-off of sub-control return circuit module, protective relay
J4 coil terminals power off therewith, main loop module cutting.
F tested relay J0 and intermediate relay J1 disabled status) are detected, and carries out corresponding operation.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811170996.5A CN109459686B (en) | 2018-10-09 | 2018-10-09 | Electrical service life testing device for large-current electromagnetic relay |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811170996.5A CN109459686B (en) | 2018-10-09 | 2018-10-09 | Electrical service life testing device for large-current electromagnetic relay |
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| Publication Number | Publication Date |
|---|---|
| CN109459686A true CN109459686A (en) | 2019-03-12 |
| CN109459686B CN109459686B (en) | 2020-09-08 |
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| CN201811170996.5A Active CN109459686B (en) | 2018-10-09 | 2018-10-09 | Electrical service life testing device for large-current electromagnetic relay |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111722100A (en) * | 2019-03-18 | 2020-09-29 | 现代自动车株式会社 | High voltage relay system of vehicle and its diagnosis method |
| CN112578769A (en) * | 2020-12-04 | 2021-03-30 | 沈阳铁路信号有限责任公司 | Dynamic driving box time characteristic testing method based on TW hump |
| WO2023029977A1 (en) * | 2021-08-30 | 2023-03-09 | 中国第一汽车股份有限公司 | Fault detection method and apparatus for vehicle relay group, and vehicle control system |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2004057635A1 (en) * | 2002-12-20 | 2004-07-08 | Siemens Aktiengesellschaft | Method and device for determining the remaining service life of a switchgear |
| CN106772014A (en) * | 2016-12-30 | 2017-05-31 | 中车长春轨道客车股份有限公司 | A kind of miniature circuit breaker electric life test system and method |
| CN107656200A (en) * | 2017-11-09 | 2018-02-02 | 北京长城华冠汽车技术开发有限公司 | A kind of battery relay life estimate device and evaluation method |
| CN107991605A (en) * | 2017-11-16 | 2018-05-04 | 湖南工业大学 | Relay life count measurement method |
-
2018
- 2018-10-09 CN CN201811170996.5A patent/CN109459686B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2004057635A1 (en) * | 2002-12-20 | 2004-07-08 | Siemens Aktiengesellschaft | Method and device for determining the remaining service life of a switchgear |
| CN106772014A (en) * | 2016-12-30 | 2017-05-31 | 中车长春轨道客车股份有限公司 | A kind of miniature circuit breaker electric life test system and method |
| CN107656200A (en) * | 2017-11-09 | 2018-02-02 | 北京长城华冠汽车技术开发有限公司 | A kind of battery relay life estimate device and evaluation method |
| CN107991605A (en) * | 2017-11-16 | 2018-05-04 | 湖南工业大学 | Relay life count measurement method |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111722100A (en) * | 2019-03-18 | 2020-09-29 | 现代自动车株式会社 | High voltage relay system of vehicle and its diagnosis method |
| CN112578769A (en) * | 2020-12-04 | 2021-03-30 | 沈阳铁路信号有限责任公司 | Dynamic driving box time characteristic testing method based on TW hump |
| WO2023029977A1 (en) * | 2021-08-30 | 2023-03-09 | 中国第一汽车股份有限公司 | Fault detection method and apparatus for vehicle relay group, and vehicle control system |
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Address after: 102200 Beijing science and Technology Park of Changping District Bai Fu Road 18 Applicant after: Rongshengmeng Guli New Energy Technology Co.,Ltd. Address before: 102200 Beijing city Changping District Bai Fu Road 18 Applicant before: CITIC GUOAN MENGGULI POWER TECHNOLOGY Co.,Ltd. |
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Effective date of registration: 20221212 Address after: 301800 No.8 Sunshine Avenue, Jiuyuan Industrial Park, Baodi District, Tianjin Patentee after: Tianjin rongshengmeng Guli New Energy Technology Co.,Ltd. Address before: 102200 Beijing science and Technology Park of Changping District Bai Fu Road 18 Patentee before: Rongshengmeng Guli New Energy Technology Co.,Ltd. |